title: The spread of adaptation in human foveal and parafoveal cone vision.
abstract: We investigated the spread of bleaching adaptation for human cone vision in the central fovea and at an eccentricity of 5 deg in the nasal retina. Cone thresholds measured after adaptation to a grating bleach were compared to those measured after a uniform bleach. We conclude that the foveal and parafoveal cone systems show excellent localization of the effects of adaptation. For areas 2.5-5 min removed from the bleach, our measurement show only small sensitivity losses amounting to between 0.10 and 0.25 log unit elevation in threshold, after taking account of optical scatter.
authors.affiliation: Department of Cognitive Sciences, University of California, Irvine 92717.
authors.forename: C M
authors.initials: CM
authors.lastname: Cicerone
authors.forename: M M
authors.initials: MM
authors.lastname: Hayhoe
authors.forename: D I
authors.initials: DI
authors.lastname: MacLeod
mesh_terms: D000221:Adaptation, Ocular / Q000502:physiology*; D003623:Dark Adaptation / Q000502:physiology; D005260:Female; D005584:Fovea Centralis / Q000502:physiology*; D006801:Humans; D008027:Light; D010364:Pattern Recognition, Visual / Q000502:physiology*; D010786:Photoreceptor Cells / Q000502:physiology*; D012542:Scattering, Radiation; D012684:Sensory Thresholds / Q000502:physiology; D013997:Time Factors